Retirement Benefits (Components Of Net Periodic Benefit Cost (Credit)) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 14.2	$ 16.4	$ 17.3
Interest cost	67.8	76.4	84.7
Expected return on assets	(133.1)	(134.7)	(128.2)
Recognized actuarial loss	28.3	30.5	26.4
Amortization of prior service credit	(0.8)	(0.8)	(0.8)
Settlement loss	11.0	13.8	21.3
Net periodic benefit cost (credit)	(12.6)	1.6	20.7
Other Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	6.7	6.8	6.3
Interest cost	22.4	27.5	31.4
Expected return on assets	(22.1)	(21.0)	(17.3)
Recognized actuarial loss	11.2	14.1	10.2
Amortization of prior service credit	(13.3)	(13.3)	(12.0)
Net periodic benefit cost (credit)	$ 4.9	$ 14.1	$ 18.6